Thread: I give up, after many, many years!
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Old May 20th 08, 04:23 PM posted to rec.aviation.piloting,rec.aviation.student
Bertie the Bunyip[_25_]
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Posts: 3,735
Default I give up, after many, many years!
wrote in news:1e17fe82-b0ac-4819-81f7-
:

On May 19, 8:43 pm, "Ken S. Tucker" wrote:

That isn't possible.

Sure it is.
As long as you're not accelerating, which is something
that can be sensed by audio RPM , the magnetic
compass can operate as an artificial horizon too,
because it's like a plumb-bob.
It's of course, independant of operating systems.

You haven't flown, really, have you? If you had, you'd
know that the compass, being suspended from a pivot, is kept upright
by gravity, just like the ball in the turn coordinator stays in the
bottom of its tube by gravity. However, in a coordinated turn, the
TC's ball stays centered and the compass's card stays level with the
airplane's wings, not with the horizon. If it did we wouldn't need to
spend $900 on an attitude indicator; we could use the ball and
compass.


It doesn't even stay level with the airplane! Compass dip will have it
doing all sorts of tricks. Trying to keep up with one of them in a turn
is very difficult to say the least. Even turning to a north or south
heading using lead lag should almost be classed as wishful thinking.



Bertie